nhờ mn
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6 unhealthy
7 behavior
8 southest
9 industrial
10 belief
bài 2
1 silent
2 holes
3 of
4 will
5 take
6 unhealthy
7 behavior
8 southest
9 industrial
10 belief
bài 2
1 silent
2 holes
3 of
4 will
5 take
1. finished
2. few
3. than
4. ?
5. for
6. was tough
7. them
8. good
9. just
10. had
11. going
12. to
13. piece
14. would
15. any
16. what
17. make
18. and
19. you
20. much
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2 few
3 than
4 sai
5 for
6 was
7 them
8 good
9 just
10 had
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12 last
14 would
15 any
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18 and
19 you
20 much
Áp dụng pytago: \(BC=\sqrt{AB^2+AC^2}=10\left(cm\right)\)
Áp dụng HTL: \(AB\cdot AB=AH\cdot BC\Rightarrow AH=\dfrac{6\cdot8}{10}=4,8\left(cm\right)\)
Vì AM là trung tuyến ứng với cạnh huyền BC nên \(AM=\dfrac{1}{2}BC=5\left(cm\right)\)
Áp dụng pytago: \(HM=\sqrt{AM^2-AH^2}=1,4\left(cm\right)\)
come
learned
will go
were
had
would buy
has
will be
would prepare
won't pass
gets
would sell
won't help
doesn't practice
will phone
will give
would sail
had
won
could we meet
2,
a, x=0 hoặc x-1=0 <=> x=0 hoặc x=1
b, x2-2x=0 <=> x(x-2)=0 => x=0 hoặc x-2=0 <=> x=0 hoặc x=2
c,(x-1)2-x2+2x=0 => x2-2x+1-x2+2x =0 <=> 1=0 vô lý
d, 4x2 -2(2x-1)2=0 <=> 4x2-2(4x2-4x+1) =0<=> 4x2-8x2+8x-2=0
<=> -4x2+8x-2 =0 <=> 2x2-4x+1=0 pt này có nghiệm căn là \(2\pm\sqrt{3}\) nên bạn xem lại coi vì lớp 8 chưa học đến thì phải học lâu r mk ko nhớ rõ .